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5nqh

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Revision as of 12:10, 26 August 2020

Structure of the human Fe65-PTB2 homodimer

Structural highlights

5nqh is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[APBB1_HUMAN] Transcription coregulator that can have both coactivator and corepressor functions. Adapter protein that forms a transcriptionally active complex with the gamma-secretase-derived amyloid precursor protein (APP) intracellular domain. Plays a central role in the response to DNA damage by translocating to the nucleus and inducing apoptosis. May act by specifically recognizing and binding histone H2AX phosphorylated on 'Tyr-142' (H2AXY142ph) at double-strand breaks (DSBs), recruiting other pro-apoptosis factors such as MAPK8/JNK1. Required for histone H4 acetylation at double-strand breaks (DSBs). Its ability to specifically bind modified histones and chromatin modifying enzymes such as KAT5/TIP60, probably explains its trancription activation activity. Function in association with TSHZ3, SET and HDAC factors as a transcriptional repressor, that inhibits the expression of CASP4. Associates with chromatin in a region surrounding the CASP4 transcriptional start site(s).^[1] ^[2] ^[3] ^[4] ^[5]

Publication Abstract from PubMed

Physiological function and pathology of the Alzheimer's disease causing amyloid precursor protein (APP) are correlated with its cytosolic adaptor Fe65 encompassing a WW and two phosphotyrosine-binding domains (PTBs). The C-terminal Fe65-PTB2 binds a large portion of the APP intracellular domain (AICD) including the GYENPTY internalization sequence fingerprint. AICD binding to Fe65-PTB2 opens an intra-molecular interaction causing a structural change and altering Fe65 activity. Here we show that in the absence of the AICD, Fe65-PTB2 forms a homodimer in solution and determine its crystal structure at 2.6 A resolution. Dimerization involves the unwinding of a C-terminal alpha-helix that mimics binding of the AICD internalization sequence, thus shielding the hydrophobic binding pocket. Specific dimer formation is validated by nuclear magnetic resonance (NMR) techniques and cell-based analyses reveal that Fe65-PTB2 together with the WW domain are necessary and sufficient for dimerization. Together, our data demonstrate that Fe65 dimerizes via its APP interaction site, suggesting that besides intra- also intermolecular interactions between Fe65 molecules contribute to homeostatic regulation of APP mediated signaling.

Fe65-PTB2 Dimerization Mimics Fe65-APP Interaction.,Feilen LP, Haubrich K, Strecker P, Probst S, Eggert S, Stier G, Sinning I, Konietzko U, Kins S, Simon B, Wild K Front Mol Neurosci. 2017 May 11;10:140. doi: 10.3389/fnmol.2017.00140., eCollection 2017. PMID:28553201^[6]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Perkinton MS, Standen CL, Lau KF, Kesavapany S, Byers HL, Ward M, McLoughlin DM, Miller CC. The c-Abl tyrosine kinase phosphorylates the Fe65 adaptor protein to stimulate Fe65/amyloid precursor protein nuclear signaling. J Biol Chem. 2004 May 21;279(21):22084-91. Epub 2004 Mar 18. PMID:15031292 doi:10.1074/jbc.M311479200
↑ Nakaya T, Kawai T, Suzuki T. Regulation of FE65 nuclear translocation and function by amyloid beta-protein precursor in osmotically stressed cells. J Biol Chem. 2008 Jul 4;283(27):19119-31. Epub 2008 May 9. PMID:18468999 doi:M801827200
↑ Lau KF, Chan WM, Perkinton MS, Tudor EL, Chang RC, Chan HY, McLoughlin DM, Miller CC. Dexras1 interacts with FE65 to regulate FE65-amyloid precursor protein-dependent transcription. J Biol Chem. 2008 Dec 12;283(50):34728-37. Epub 2008 Oct 15. PMID:18922798 doi:M801874200
↑ Cook PJ, Ju BG, Telese F, Wang X, Glass CK, Rosenfeld MG. Tyrosine dephosphorylation of H2AX modulates apoptosis and survival decisions. Nature. 2009 Apr 2;458(7238):591-6. doi: 10.1038/nature07849. Epub 2009 Feb 22. PMID:19234442 doi:10.1038/nature07849
↑ Kajiwara Y, Akram A, Katsel P, Haroutunian V, Schmeidler J, Beecham G, Haines JL, Pericak-Vance MA, Buxbaum JD. FE65 binds Teashirt, inhibiting expression of the primate-specific caspase-4. PLoS One. 2009;4(4):e5071. doi: 10.1371/journal.pone.0005071. Epub 2009 Apr 3. PMID:19343227 doi:10.1371/journal.pone.0005071
↑ Feilen LP, Haubrich K, Strecker P, Probst S, Eggert S, Stier G, Sinning I, Konietzko U, Kins S, Simon B, Wild K. Fe65-PTB2 Dimerization Mimics Fe65-APP Interaction. Front Mol Neurosci. 2017 May 11;10:140. doi: 10.3389/fnmol.2017.00140., eCollection 2017. PMID:28553201 doi:http://dx.doi.org/10.3389/fnmol.2017.00140

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5nqh"

@@ Line 1: / Line 1: @@
 ==Structure of the human Fe65-PTB2 homodimer==
-<StructureSection load='5nqh' size='340' side='right' caption='[[5nqh]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
+<StructureSection load='5nqh' size='340' side='right'caption='[[5nqh]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5nqh]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NQH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5NQH FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5nqh]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NQH OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5NQH FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5nqh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nqh OCA], [http://pdbe.org/5nqh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5nqh RCSB], [http://www.ebi.ac.uk/pdbsum/5nqh PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5nqh ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5nqh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nqh OCA], [http://pdbe.org/5nqh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5nqh RCSB], [http://www.ebi.ac.uk/pdbsum/5nqh PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5nqh ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 22: / Line 22: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Feilen, L P]]
 [[Category: Haubrich, K]]

5nqh

From Proteopedia

Revision as of 12:10, 26 August 2020

Structure of the human Fe65-PTB2 homodimer

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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